Shorten long version strings

When showing multiple available versions, shorten the string, for example by putting ... in the middle

```
instead of 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6, 0.1.7
show 0.1.0, ..., 0.1.7
```

Locate the code that formats multiple available dependency versions and compare its output with the example in the issue. The work is done when long version lists are shortened with an ellipsis while the first and last versions remain visible; no test or file is named in the issue.

Written by the indexing model from the issue text.